FUZZY WEIGHT CONTROLLER BASED CELL-SITE DIVERSITY FOR RAIN FADING MITIGATION IN LMDS NETWORKS IN THE TROPICS

Abstract

Local multipoint distribution service (LMDS) is a broadband wireless access technology that operates at microwave frequencies above 25GHz. However, severe attenuation due to excessive rain in tropical regions presents a major challenge for achieving reliable communication over such frequencies. To overcome this problem, cell-site diversity (CSD) can be deployed in cellular- type LMDS networks. In this paper, we address the problem of reliable communication for LMDS networks in heavy rain regions by proposing a fuzzy weight controller based cell-site diversity (FWC- CSD) scheme. Rain cells are randomly simulated in an LMDS network to analyze the system performance using the proposed FWC-CSD scheme. Simulation results show that the proposed scheme yields improved performance in terms of average outage probability and throughput while maintaining the overall quality of service.